Door and brake control device



Patented Apr 23, 1929 1311 EDGEWUQLD,

lElil'll GFFHCE.

Application filed January 4, 1.9,58. Serial No. 244,891.

brid e 3 iii; p ncipol 'lhis invenl'ion rciules l a controlled controllhr: devices run obiecl to provide e-.e means for controllir :iluid under pressure for oil's cling lh opening of lhe cur doors and in which the supply of fluid under pressi 'e is available only when the brakes are up; lied.

in the accompanying); drawing, the, single vfigure is a diagrammatic view, per :lv in secliion, of a door and brake cont o hug u, r

'utus embodying: 'iny iiwenl'ioi As shown in the (ll-swing, o nuguelvalve device is provided cou'ipri 'i on elcclromagnet 1 and double boob lves 2 and 3 udupied lo be operow l by said inugrne i l chamber 1 intermediate said vulves is coluected so a pipe 5, which pipe conslailu; s l'ho supply pipe from which fluid under prlss-xure supplie ilor elliociiue l he opening 011 l'he car doors and ruiless the pipe 5 is supplied wilh lluid under pressijare, the our doors cunnoi be opened.

The valve 3 is contained in a valve currinber 6 and is subject to the pressure of: s coil spring 7 tending be soul lee vol sod chamber 6 is connected to a 11min reservoir 16 or other source or" .ltluid pressure supply.

A switch device is also provided comprislog; a casino; 8 containing); u jllexiblo disphrsgm 9, having; chamber 1() ol; one side counecized through pipe 11 wiih l-he brulro cvilndcr 12. Associated with the disphrirg m 9 is a bridging contezlx member lif'l'zulsptecl when moved by the diaphragm to connect fixed Contact nienilbers 1d. The fixed contact members 1 1 are connected. to a circuit including the magnet 1 end a source of current 15. I

lliiounted in chamber 1'? is e coil sprirrg; 18 which engages i'he member 18 and urges sari d inei'nber and the diriphr gm 9 to the posiiion in which the llld ll'll circuit is opened, shown in the drawing,

in operation, when the brakes are released and there is no fluid pressure in the brake cylinder 12, 'l'he chamber 10 oi? i he switch device is sit atmospheric pressure and the 18 maintains the cont co member 13 in, lihe open position, The nu ses 1 is there- 'liore deenerpgized and she valve 3 is maintained seated by the spring 7, while the valve 2 is held unsealed, so that chamber 4 and supply pipe 5 are connected to on zit-1m spheric spring;

port 19. It will lhus be seen that with the brakes released, the OPQliiifll cannot open the tar doors, since there is no fluid under pressure supply in the pipe 5.

ll hen the brakes e applied and fluid under pressure is supp led to the brake cylinder 12, fluid under pressure is also supplied to the chamber 10, so dial; the diaphragm 9 is operated to cause the contact member 13 to bridge the Contact ineuibers 1 1 ard lhereby close the circuit lihrouo'h lhe nmgnet 1. The ii'iugz net 1 boin thus energized, the valve sealed, while the valve 3 unsezrted, so lhut fluid under pressure is supplied from liho iuziiju reservoir 16 to the door opening supply pipe The opcrilor may now eliecl; the opening of the our doors in thousuzil war or, as will be evident.

le one illustrative embodiment of the on has been described in detail, it is not my ii leniion lo limit its scope to that 1, eiulmliineut or otherwise than by the terms rolled means to supply fluid under pressure 7 lo said pipe, 1 I

52. The combination with :1 fluid pressure supply pipe, fluid under pressure from which is employed to control the or! doors, of u source of fluid under pressure, 2r valve for controlling the supply of fluid from said source lo said pipe, :1 magnet for ope sting ssid valve, and on. switch device operated upon applying; rho brakes -lor controlling the circuit of said magnet.

3. The combination wirh :i fluid pressure supply pipe, fluid under pressure from which is employed to control the our doors, of a source Oill fluid under pressure, a valve for controlling}; the suiiioly oi fluid from said source to said pipe 2. magnet for operating ssid valve. and swilch device 0 )erzired only l. The combination With a fluid pressure supply pipe, fluid under pressure from which is employed to control the car clears, of a source of fluid under pressure, double beat valves for connecting said pipe to sail SOLH'CG I of pressure er to the atumspllere, a l'nap uet fer 0 JQIilt-llfl sand Valves. u swllch ClGVlCG for SIDNEY DOKVN. 

